Metal-punching machine.



G.P.THOMAS METAL PUNCHING MACHINE.

APPLICATION FILED MAY 2], I9I4.

' Patented Dec. 10, I918.

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METAL PUNCHING MACHINE. APPLICATION FILED MAY 21. m4.

Patented Dec. 10, 1918.

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INVENTOR [2mg Jfmu machinery for punching holes in metal GEORGE PAUL THOMAS, OF GLEN SHAW, PENNSYLVANIA.

METAL-PUNC HING MACHINE.

Specification of Letters Patent.

Patented Dec. 10, 1918.

Application filed May 27, 1914. Serial No, 841,332.

To all whom it may concern: i Be it known that I, GEORGE PAUL THOMAS, residing at Glenshaw, in the countyof-Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Metal Punching Machines, of which improvements the following is a specification. I

My invention relates to improvement in plates, beams, and such like articles.

In the accompanying drawings, Figure 1 is a view in side elevation of the web plate of a steel sill of a freight car. It is the object of the present invention to provide a machine to punch expeditiously the rivetholes in an article having such an arrangement of rivet-holes as is exemplified in this web plate. Fig. 2 shows in plan the anvil portion of the punching machine; Fig. 3 shows the entire machine in front elevatlon; and Fig. 4 shows the machine in part in end elevation, and in part (through the punching-head) in vertical section.

Referring first to Fig. 1, it will be observed that the web plate of the car sill there shown must be punched with variously disposed rows of rivet holes: there are, first, the rows a-b, c0l, 6-7, and ij, extending all of them in parallel lines, longitudinally of the plate; there are, second, the rows 9-70 and h-m, extending at right angles to the rows first noted, transversely across the plate; and there are, third, the rows bc and de, extending obliquely with respect to the length ,of the plate.

In punching-machines now in use, the punching of the longitudinal rows and of the transverse rows of rivet-holes can readily be effected, and that in a single passage of thematerial through the'punch. In making these car sills and other articles requiring the punching of such longitudinal and transverse rows as well as several rows of rivet holes oblique intheir relative disposition, it has been theusual practice to. punch the holes of the longitudinal rows by spacingtablemachinery, and then to punchthe oblique rows by the'slow method of hand adjustment of the material beneath the punch. In the machine'of my present invention all of this positioning is mechanically controlled, and the gain in speed and precision 1s great.

Referring to Figs. 2, 3, and 4, 1 is the reciprocating head of the punching-machine.

equipped with the punches 10, 10*; and 3 is of punches 10 and corresponding dies 20*.

Referring again to Fig. 1, the arrangement of the machine is such as to take and punch at one time two web plates; such as Fig. 1 shows, arranged symmetrically, straightedge (z'-j) to the corresponding edge of the other plate. In passing through the machine, the entire line of holes i-j and the transverse rows of holes g'lc and h m, are punched by the punches of the second row (the right-hand row, Fig. 4) 10 20*; while the irregular row of holes ab'-c -d-ef is punched by the punches of the first row, 10,20. If desired, the longitudinal rows, ab, c-d, and ef, may be punched by the punches of the second row, and only the oblique rows b0 and de of the rivet-holes punched by the punches 10, 20 of the first row.

I come now to describe the arrangement for mechanically producing the oblique rows of holes in the plate .fed longitudinally through the punch.

The punches and'dies of one row (or certain of them, for it .is manifest that details of arrangement maybe modified) 10 and 20 are made movable, transversely of. the path of the travel of the material through the punch, and means areprovided for effecting such movement as the punching of a given piece of work progresses, to the end that a longitudinal advance ofthematerial together with the transverse shifting of punch and die between successive punching strokes may result in an oblique succession of rivet-holes.

To this end punch and die and 20 (and the drawings Show symmetrically placed pairs of punches and dies) are, both of them, borne in blocks or'holders Qand which are carried in head 1 and anvil 3 to move transversely; and means for moviiig them are provided. Any suitable means may be employed; I show iny preferred means, consisting of a screw-shaft 21. The turning of this screw-shaft effects the transverse shifting or the holdersQ and 4 any preferredme; chanical connection may be adopted to efi'ect this end. For eiiample, the die-block 4 may be screw-threaded and receivcthe shaft 21 and the punch-block 2 may, be constructed for movement in unison with the die-block, by iii'eans of the pin-and-socket or an equiv-. alent sliding connection, engagement 22 of these parts, one with the other. It White perfectly manifest that theturning of Screw 21 will shift die-block 4 and With it punchblock 2. p I y I I have said that the punches for these oblique rov'vs' of holes are in this machine mounted in symmetrical pairs; and, referring to Fig. 3, it. is apparent that the reverse threading oi? screiv sha-ft 21 atits opposite ends lvvh'ere it engages the symmetricallypaired block's Will afford a machine in vvhich a turning ofthe shaft in one direction ,Will

cause both bloclis tdre'cede, symmetrically, ivhile areverseitur'nlng will cause them to apprcach.

Thegags 23 forthe punches 10 may be controlled the handslever 24:; but this matter is incidental, and forms no part of my present invention, o

In. Letters P atent' .No. 1,064,397, granted mejJu e 1913, ,Ihave shown and described blocksor holders for die and punch of suitable shapero'r ready attachment and removal to and from anvil -and punchinghead and for adj ustinent in position therein, atth same timecoiistructed to endure the strains ,of service most advantageously. I

- strip ithe: points 5 successive stopping may be indicated in advance.

The operation of the parts as thus far shown and described Will readily be understood. As a pair of car sill plates such as shown in Fig. 1 advances through the machine, a proper setting of the gags of punches 10 Will insure the punching of the lines of rivet-holes i -j, 91-70, and h-m. This is quite obvious to one acquainted with machines of this nature. The lines of holes I 'ab, c-oZ, and e-f, may also be punched by the punches, 10*, if desired.- riawever, as shown, the holes of the entire irregular row abc d f ispunched by one of the punches 10 of the firstrovv. The rev} arrb is punched in normal manner, the Q i arr use i of sp c n -tab warref rreid d si -1 When t epoin bisi c si nd t il st of th ho es OHM-lon ud al row is punched, the lateralshif-tingofthe punches 10 and the dies 20 begins. In the interval preceding eachof the ensuing punching operations the punches and dies are .sh-ifted through the distance indicated by. m rk 0 t e strip; ,;a1 dsth spacing-table being e ective before, the successive, punching operations are performedat the desired: points. 'At point 0 the shifting of the punches and dies later.- ally ceases, until; point cl is reached, ,When shiftingin reverse direction begins andcon} .tinues to pointe. 'Thereafter the punches remain unmoved. T I-claim'as myinvention: 1.111 a metal-punching machine the combination of an anvil :and .a reciprocatory Pun hin ee W P ed mp em ary punching tools, one member of each pair being borne in said anvil and the other member in said punching-head, sliding connections between one of said pairs of tools, said lastmentioned pairs of tools being moviable in a direction transverseto the ease tionof the reciprocation ,of the punching head, and the other of thetwo said pairs of tools positioned to one side of thc'path of transverse movement of the movable pair of tools.

. 2. In a metal-punching machine the coiiibination of an anvil and a reciprocatory punching-head, seats in said-anvil and punching-head for tvv o rows (if complementary punching tools,'eiitending in. parallelism and transverse to the path of advance of material through the machine, pair complementary tools mounted movably in one pairv of complementary seats anvil and punching head, and means for moving the said pair of tools. v 5, 3.. In a mtaI punching machine. the combination with an anvil and a recipro'catory punching head, of a die holder and punch holder mounted respectively uponsaid aiivil and headE and r'nov'able in. a essence asts i verse to theline of reciprocation of said head, a cylindrical punch borne by the causes both of said holders to simultanepunch holder and a cooperating cylindrical ously move equal distances. 7 10 die by the die holder, at single screw rota- In testimony whereof I have hereunto set tably mounted in a fixed bearing and engagmy hand.

5 ing one of said holders for causing it to GEORGE PAUL THOMAS.

move upon the rotation of the screw, :1 s1id- Witnesses:

ing pin-and-socket connection between said BAYARD H. CHRISTY,

holders whereby the rotation of said screw FRANCIS J. TOMASSON.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of ratentl. Washington, D. G. 

